Earlier this year, White Castle tested the plant-based Impossible Slider at locations in New York, New Jersey, and Chicago. After a successful pilot program, it’s now available at all White Castle locations nationwide.

The Impossible Slider is topped with smoked cheddar cheese, pickles, and onions on a signature bun, and is available individually for $1.99. We reviewed it back in May. It’s available for a limited time at participating restaurants.